Page 19 of 1399
IN04S−30
−
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMSIN−17
17
Author: Date:
1996 LAND CRUISER (RM451U)
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
A large number of ECU controlled systems are used in the LAND CRUISER. In general, the ECU controlled
system is considered to be a very intricate system requiring a high level of t\
echnical knowledge and expert
skill to troubleshoot. However, the fact is that if you proceed to inspect the circuits one by one, trou\
bleshoot-
ing of these systems is not complex. If you have adequate understanding of the system and a basic knowl-
edge of electricity, accurate diagnosis and necessary repair can be performed to locate and fix the pr\
oblem.
This manual is designed through emphasis of the above standpoint to help service techn\
icians perform ac-
curate and effective troubleshooting, and is compiled for the following major ECU con\
trolled systems:
The troubleshooting procedure and how to make use of it are described on\
the following pages.
SystemPage
1. EngineDI−1
2. Automatic TransmissionDI−129
3. Anti− Lock Brake SystemDI−188
4. Supplemental Restraint SystemDI−238
5. Cruise Control SystemDI−284
FOR USING OBD II SCAN TOOL OR TOYOTA HAND−HELD TESTER
Before using the scan tool or tester, the scan tool’ s instruction book or tester’s operator manual should
be read thoroughly.
If the scan tool or tester cannot communicate with ECU controlled systems \
when you have connected
the cable of the scan tool or tester to DLC3, turned the ignition switch\
ON and operated the scan tool,
there is a problem on the vehicle side or tool side.
(1) If communication is normal when the tool is connected to another vehicle, \
inspect the diagnosis data link line (Bus line) or ECU power circuit of the vehicle.
(2) If communication is still not possible when the tool is connected to anoth\
er vehicle, the problem is probably in the tool itself, so perform the Self Test procedures outline in the Tester Operator’s
Manual.
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Page 35 of 1399
IN04Q−07
−
INTRODUCTION TERMS
IN−33
33
Author: Date:
1996 LAND CRUISER (RM451U)
TERMS
ABBREVIATIONS USED IN THIS MANUAL
AbbreviationsMeaning
ABSAnti−Lock Brake System
ACAlternating Current
ACCAccessory
ACISAcoustic Control Induction System
ACSDAutomatic Cold Start Device
A.D.D.Automatic Disconnecting Differential
A/FAir−Fuel Ratio
AHCActive Height Control Suspension
ALRAutomatic Locking Retractor
ALTAlternator
AMPAmplifier
ANTAntenna
APPROX.Approximately
A/TAutomatic Transmission (Transaxle)
AT FAutomatic Transmission Fluid
AUTOAutomatic
AUXAuxiliary
AV GAverage
AV SAdaptive Variable Suspension
BABrake Assist
BACSBoost Altitude Compensation System
BATBattery
BDCBottom Dead Center
B/LBi−Level
B/SBore−Stroke Ratio
BTDCBefore Top Dead Center
BVSVBimetallic Vacuum Switching V alve
Calif.California
CBCircuit Breaker
CCoCatalytic Converter For Oxidation
CDCompact Disc
CFCornering Force
CGCenter Of Gravity
CHChannel
COMB.Combination
CPECoupe
CPSCombustion Pressure Sensor
CPUCentral Processing Unit
CRSChild Restraint System
CTRCenter
C/VCheck Valve
CVControl Valve
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Page 55 of 1399
AT0SY-01
-
AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION SYSTEM
AT-1
1996 LAND CRUISER (RM451U)
AUTOMATIC TRANSMISSION SYSTEM
PRECAUTION
If the vehicle is equipped with a mobile communication system, refer to th\
e precautions in the IN section.
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Page 121 of 1399
AT0SZ−01
V07130
Shift Lever PositionGear PositionParkingC0C1C2B0B1B2B3F0F1F2
Reverse
Neutral 1st
2nd
3rd
O/D
P
R
N
D
2
L
1st
2nd
*1
3rd
1st
*2 2nd
Operating
*1 Down− shift only in the 2 position and 3rd gear −no up− shift.
*2 Down− shift only in the L position and 2nd gear −no up− shift.
O/D Direct
Clutch (C
0)
2nd Coast Brake (B1)
O/D Brake (B
0) Direct
Clutch (C2)
Forward Clutch (C
1)
2nd Brake (B
2)
1st & Reverse
Brake (B
3)
Rear Planetary Carrier
Rear Planetary Ring Gear
Output Shaft
Front & Rear Planetary
Sun Gear
No.2 One−Way
Clutch (F
2)
No.1 One−Way
Clutch (F
1)
Front Planetary
Ring Gear
Front Planetary
Carrier
O/D Planetary
Ring Gear
O/D Planetary
Carrier
O/D Planetary
Sun Gear
Input Shaft
O/D Input Shaft
O/D One−Way
Clutch (F
0)
AT−2
−
AUTOMATIC TRANSMISSION AUTOMATIC TRANSMISSION SYSTEM
1996 LAND CRUISER (RM451U)
OPERATION
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Q07268
AT0T0−01
Q07264
Z15453
SST
Z15454
SST
Q07268
−
AUTOMATIC TRANSMISSION SPEEDOMETER DRIVEN GEAR
AT−3
787
Author: Date:
1996 LAND CRUISER (RM451U)
SPEEDOMETER DRIVEN GEAR
ON−VEHICLE REPAIR
1. DISCONNECT SPEEDOMETER CABLE AND RE-
MOVE SPEEDOMETER DRIVEN GEAR
(a) Loosen the serrated collar with pliers. Do not lose the felt
dust protector and washer.
(b) Disconnect the speedometer cable.
(c) Remove the bolt and locking plate. Pry out the speedom-
eter driven gear assembly.
(d) Remove the O−ring from the speedometer driven gear assembly.
(e) Remove the clip and speedometer driven gear from the speedometer driven gear sleeve.
2. REMOVE SPEEDOMETER DRIVEN GEAR OIL SEAL
Using SST, remove the oil seal. SST 09921−00010
3. REINSTALL SPEEDOMETER DRIVEN GEAR OIL SEAL
Using SST, install a new oil seal. SST 09201−10000 (09201 −01080)
Drive in depth: 20 mm (0.79 in.)
4. REINSTALL SPEEDOMETER DRIVEN GEAR AND CONNECT SPEEDOMETER CABLE
(a) Install the clip and speedometer driven gear to the
speedometer driven gear sleeve.
(b) Install a new O−ring to the speedometer driven gear as- sembly.
(c) Install the speedometer driven gear.
(d) Install the locking plate with the bolt.
Torque: 16 N·m (160 kgf·cm, 12 ft·lbf)
(e) Connect the speedometer cable.
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AT−4
−
AUTOMATIC TRANSMISSION SPEEDOMETER DRIVEN GEAR
788
Author: Date:
1996 LAND CRUISER (RM451U)
(f) Tighten the serrated collar with pliers.
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Page 124 of 1399
Q07265
AT0T1−01
−
AUTOMATIC TRANSMISSION VEHICLE SPEED SENSOR
AT−5
789
Author: Date:
1996 LAND CRUISER (RM451U)
VEHICLE SPEED SENSOR
ON−VEHICLE REPAIR
1. DISCONNECT NO.2 VEHICLE SPEED SENSOR CON-
NECTOR
2. REMOVE NO.2 VEHICLE SPEED SENSOR
(a) Remove the bolt and No.2 vehicle speed sensor.
(b) Remove the O− ring from the No.2 vehicle speed sensor.
3. REINSTALL NO.2 VEHICLE SPEED SENSOR
(a) Coat a new O −ring with ATF and install it to the No.2 ve-
hicle speed sensor.
(b) Install the No.2 vehicle speed sensor and torque the bolt.
Torque: 5.4 N·m (55 kgf·cm, 48 in.·lbf)
4. RECONNECT NO.2 VEHICLE SPEED SENSOR CON- NECTOR
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Page 125 of 1399
AT0T3−02
Q07388
AT−6
−
AUTOMATIC TRANSMISSION PARK/NEUTRAL POSITION (PNP) SWITCH
790
Author: Date:
1996 LAND CRUISER (RM451U)
PARK/NEUTRAL POSITION (PNP)
SWITCH
ON−VEHICLE REPAIR
1. DISCONNECT 2 OIL COOLER PIPES (See page
AT−16 )
2. DISCONNECT PARK/NEUTRAL POSITION SWITCH CONNECTOR
3. REMOVE PARK/NEUTRAL POSITION SWITCH
(a) Pry off the lock washer and remove the nut.
(b) Remove the bolt and park/neutral position switch.
4. REINSTALL PARK/NEUTRAL POSITION SWITCH
(a) Install the park/neutral position switch and bolt.
(b) Install a new lock plate and the nut. Torque: 6.9 N·m (70 kgf·cm, 61 in.·lbf)
(c) Stake the nut with the lock plate.
(d) Adjust the park/neutral position switch. (See page DI−131 )
5. RECONNECT PARK/NEUTRAL POSITION SWITCH CONNECTOR
6. RECONNECT 2 OIL COOLER PIPES (See page AT−17 )
Adjust the shift lever position. (See page DI−131)
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